公开(公告)号：US20210221996A1

公开(公告)日：2021-07-22

申请号：US17055957

申请日：2020-02-10

Applicant: LG CHEM, LTD.

Inventor： Joon Hwi JO ,  Seong Lyong KIM ,  Tae Hoon KIM ,  Dae Woo LEE ,  Jae Bum SEO

IPC: C08L51/04 ,  C08L25/12 ,  C08L25/14 ,  C08L33/12 ,  C08K5/54

Abstract: Provided is a thermoplastic resin composition which includes: a first copolymer including an acrylic graft copolymer; a second copolymer including an alkyl-substituted styrene-based monomer unit, a vinyl cyanide-based monomer unit, and a (meth)acrylate-based monomer unit; and a third copolymer including an alkyl-unsubstituted styrene-based monomer unit, a vinyl cyanide-based monomer unit, and a (meth)acrylate-based monomer unit. According to the present invention, a thermoplastic resin composition and a thermoplastic resin molded article, which are excellent in heat resistance, colorability, and scratch resistance, can be provided.

公开(公告)号：US20210163652A1

公开(公告)日：2021-06-03

申请号：US17047657

申请日：2019-11-08

Applicant: LG CHEM, LTD.

Inventor： Ji Uk JANG ,  Dae Woo LEE ,  Jae Bum SEO ,  Jung Tae PARK ,  Gyu Sun KIM

IPC: C08F279/04 ,  C08F226/06 ,  C08F2/02 ,  C08L55/02

Abstract: Provided is a method of preparing a graft copolymer, which includes: preparing a liquid maleimide-based monomer; preparing a reaction solution including a diene-based rubber polymer, an aromatic vinyl-based monomer, and a vinyl cyan-based monomer; and adding the liquid maleimide-based monomer and the reaction solution to a reactor and carrying out polymerization. According to the preparation method of the present invention, the amount of the maleimide-based monomer involved in the polymerization can be increased, and the color characteristics, glass transition temperature, and softening temperature of the graft copolymer are improved.

公开(公告)号：US20180072881A1

公开(公告)日：2018-03-15

申请号：US15815520

申请日：2017-11-16

Applicant: LG CHEM, LTD.

Inventor： Gyu Sun KIM ,  Chang Hun HAN ,  Dae Woo LEE ,  Jae Bum SEO ,  Jung Tae PARK ,  Eun Jung CHOI ,  Byoung Il KANG ,  Da Eun SUNG

IPC: C08L25/12 ,  C08F220/44 ,  C08L55/02 ,  C08F285/00 ,  C08F2/02 ,  C08K5/14 ,  C08K5/315

Abstract: The present invention relates to a composition for preparing a SAN copolymer, a SAN copolymer, a preparation method therefor, a heat-resistant ABS resin blend comprising the same, and heat-resistant ABS pellets. Specifically, the present invention provides a composition for preparing a SAN copolymer, the composition comprising a monomer mixture, and ethylene glycol dimethacrylate as a chain extender, wherein the monomer mixture comprises 60 to 75 wt % of an α-methylstyrene monomer and 25 to 40 wt % of an acrylonitrile-based monomer based on the total weight of the monomer mixture; and the ethylene glycol dimethacrylate is contained in an amount of 0.001 to 0.15 parts by weight based on 100 parts by weight of the monomer mixture.

公开(公告)号：US20230144513A1

公开(公告)日：2023-05-11

申请号：US17919565

申请日：2021-11-18

Applicant: LG CHEM, LTD.

Inventor： Min Seung SHIN ,  Hyung Sub LEE ,  Dae Woo LEE ,  Min Cheol JU ,  Sung Won HONG ,  In Soo KIM

IPC: C08F212/10 ,  C08L25/12

CPC classification number: C08F212/10 ,  C08L25/12

Abstract: The present disclosure relates to a method for preparing a copolymer, a copolymer prepared therefrom, and a thermoplastic resin composition including the copolymer. The method includes introducing and polymerizing an aromatic vinyl-based monomer, a vinyl cyan-based monomer, and an imide-based monomer, wherein the imide-based monomer is introduced at once in an amount of 1 wt % to 24 wt % before the start of polymerization, and is continuously introduced in an amount of 76 wt % to 99 wt % from the start of the polymerization.

公开(公告)号：US20230022810A1

公开(公告)日：2023-01-26

申请号：US17782919

申请日：2021-09-14

Applicant: LG CHEM, LTD.

Inventor： Kun Ji KIM ,  Seong Yong AHN ,  Heung Kwon BAE ,  Se Woong LEE ,  Dae Woo LEE ,  Hyun Kyou HA

IPC: C08F114/06 ,  C08F2/02 ,  C08F6/00

Abstract: The present invention relates to a method for preparing a vinyl chloride-based polymer, including: bulk polymerizing a vinyl chloride-based monomer in a polymerization reactor to prepare a vinyl chloride-based polymer; and adding water and vapor to the polymerization reactor, and heating to remove an unreacted vinyl chloride-based monomer, wherein an addition amount of the water is 0.500 to 5.000 parts by weight based on 100 parts by weight of the vinyl chloride-based polymer.

公开(公告)号：US20220213247A1

公开(公告)日：2022-07-07

申请号：US17609223

申请日：2020-10-07

Applicant: LG CHEM, LTD.

Inventor： Ji Uk JANG ,  Dae Woo LEE ,  Jae Bum SEO ,  Jung Tae PARK ,  Gyu Sun KIM

IPC: C08F279/04 ,  C08F6/00 ,  B29C45/00 ,  C08J3/12

Abstract: Disclosed is a method for producing a diene-based graft copolymer resin, and a diene-based graft copolymer resin produced therefrom, the method including: adding, into a reactor, a polymerization solution containing a diene-based rubber polymer, an aromatic vinyl-based monomer, a vinyl cyan-based monomer, a polymerization initiator, and a reaction solvent, and polymerizing the polymerization solution to prepare a polymer; recovering a solution containing unreacted monomers and a reaction solvent from the polymerization solution, dispersing a releasing agent in the recovered solution, and then adding the solution into the front end of a volatilization tank; and removing the unreacted monomers and the reaction solvent from the volatilization tank.

公开(公告)号：US20210206958A1

公开(公告)日：2021-07-08

申请号：US17055941

申请日：2019-11-28

Applicant: LG CHEM, LTD.

Inventor： Jung Tae PARK ,  Dae Woo LEE ,  Jae Bum SEO ,  Gyu Sun KIM ,  Ji Uk JANG

IPC: C08L33/06

Abstract: The present invention relates to a thermoplastic resin composition, which includes a first copolymer formed by polymerizing a monomer mixture of a (meth)acrylate-based monomer, a vinyl cyan-based monomer and a maleimide-based monomer, and having a refractive index of 1.5170 or less and a glass transition temperature of 115.0° C. or more; and a second copolymer formed by graft-copolymerizing an aromatic vinyl-based monomer and a vinyl cyan-based monomer onto an acrylic rubber polymer, and the thermoplastic resin composition according to the present invention has improved heat resistance, colorability and scratch resistance.

公开(公告)号：US20180355085A1

公开(公告)日：2018-12-13

申请号：US15776756

申请日：2017-09-06

Applicant: LG CHEM, LTD.

Inventor： Jae Bum SEO ,  Dae Woo LEE ,  Jung Tae PARK ,  Gyu Sun KIM ,  Chang Hun HAN

IPC: C08F212/10 ,  C08F212/14 ,  C08F2/06 ,  C08F2/01 ,  C08F2/38 ,  C08F6/10 ,  C08K5/37 ,  C08K5/23 ,  C08K5/14

Abstract: The present invention provides a styrene-acrylonitrile (SAN) resin that exhibits significantly improved thermal resistance and, at the same time, can be produced at high productivity and is highly processable and highly moldable; and a method of producing the same by preparing and storing the solution containing a mixture of an N-substituted maleimide monomer and an unsaturated nitrile monomer at a particular temperature, introducing the solution and a styrene polymer into the polymerization reactor separately, and maintaining the first polymerization reactor and the second polymerization reactor at particular respective temperatures, thereby significantly reducing the amounts of oligomers contained in the SAN resin.

公开(公告)号：US20240150504A1

公开(公告)日：2024-05-09

申请号：US18280845

申请日：2023-01-17

Applicant: LG CHEM, LTD.

Inventor： Sung Won HONG ,  Hyung Sub LEE ,  Dae Woo LEE ,  Woo Ri KIM ,  Min Cheol JU ,  Min Seung SHIN ,  In Soo KIM

IPC: C08F212/10 ,  C08F2/18

CPC classification number: C08F212/10 ,  C08F2/18

Abstract: The present disclosure relates to a method of preparing a polymer, which includes: adding an alkyl-substituted aromatic vinyl-based monomer and a vinyl cyanide-based monomer to a reactor and initiating polymerization; and performing polymerization while continuously adding an alkyl-substituted aromatic vinyl-based monomer and a multifunctional initiator to the reactor, wherein the continuous addition of the alkyl-substituted aromatic vinyl-based monomer and the multifunctional initiator is initiated when a polymerization conversion rate is 10 to 30%, and the continuous addition of the alkyl-substituted aromatic vinyl-based monomer and the multifunctional initiator is terminated when a polymerization conversion rate is 70 to 80%.

公开(公告)号：US20230250210A1

公开(公告)日：2023-08-10

申请号：US18013202

申请日：2021-11-19

Applicant: LG CHEM, LTD.

Inventor： Ji Uk JANG ,  Dae Woo LEE ,  Jae Bum SEO ,  Jung Tae PARK ,  Jung Rae LEE

IPC: C08F285/00

CPC classification number: C08F285/00

Abstract: The present disclosure relates to a method of preparing a graft polymer, which includes: performing primary continuous polymerization by adding a diene-based rubber polymer and an aromatic vinyl-based monomer to a first reactor; and performing secondary continuous polymerization by adding the polymerization product discharged from the first reactor, a maleimide-based monomer, and a vinyl cyanide-based monomer to a second reactor.